colors = [[0.5, 0.5, 0.5], [0.8, 0, 0], [0, 0.8, 0], [0, 0, 0.8], \
        [0.5, 0.5, 0], [0.5, 0, 0.5], [0, 0.5, 0.5], \
        [0.3, 0.6, 0], [0.6, 0, 0.3], [0.3, 0, 0.6], \
        [0.6, 0.3, 0], [0.3, 0, 0.6], [0.6, 0, 0.3], \
        [0.8, 0.2, 0.5]]

